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Plextor M6V 256GB SATA III SSD Review

By: Jon Coulter | SSDs in Storage | Posted: Nov 5, 2015 5:47 pm
TweakTown Rating: 88%Manufacturer: Plextor

Iometer - Maximum IOPS


Version and / or Patch Used: Iometer 2014


We use Iometer to measure high queue depth performance. (No Partition)


Max IOPS Read




Max IOPS Write







Plextor's specified 83,000 read IOPS for the Reactor is obviously a conservative figure, as we easily exceed specification by over 10K. We are dead on hitting the drives specified 80K write IOPS. 80K IOPS is by far the best random write performance of the drives in our test pool. 15nm Toshiba MLC is looking very good.



Iometer - Disk Response


Version and / or Patch Used: Iometer 2014


We use Iometer to measure disk response times. Disk response times are measured at an industry accepted standard of 4K QD1 for both write and read. Each test runs twice for 30 seconds consecutively, with a 5-second ramp-up before each test. We partition the drive/array as a secondary device for this testing.


Avg. Write Response




Avg. Read Response






Write response times are middle of the pack. However, read response times are again another win for the M6V.



DiskBench - Directory Copy


Version and / or Patch Used:


We use DiskBench to time a 28.6GB block (9,882 files in 1,247 folders) composed primarily of incompressible sequential and random data as it's transferred from our DC P3700 PCIe NVME SSD to our test drive. We then read from a 6GB zip file that's part of our 28.6GB data block to determine the test drives read transfer rate. Our system is restarted before the read test to clear any cached data, ensuring an accurate test result.


Write Transfer Rate




Read Transfer Rate






We are starting to see a trend here. The M6V is winning all or a good portion of nearly every test so far. As expected, the M6V has a lower write transfer rate than the larger capacity drives with the exception of the TLC powered Trion. The M6V delivers the best read transfer rate of the drives on our chart.

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